Universal press



Aug'. 13, 1963 A. H. MERKER 3,100,438

UNIVERSAL PREss Filed Jan. 30, 1961 2 Sheets-Sheet 1 Fig.

Alfred H. Mer/rer Aug. 13, 1963 A. H. MERKER UNIVERSAL PRESS Filed Jan. 30, 1961 2 Sheets-Sheet 2 l G/b el@ I Il) 621 j 6m I 620 h 62a ||1i1 I 62 /NvEA/ron A/fredH Mer/rer by Zw/ @Ms/,U

5 Aromveys United States Patent O N 3,109,438 UNIVERSAL PRESS Alfred H. i

` Filed Jan. 30, 1961, Ser. No. 35,761

17 Claims. (Cl. 16d-14) My invention relates `to improvements in work holding presses for machine shops.`

Briefly and generally stated, the invention has for `its primary object to provide what may be termed a universal press in that it can be readily converted for use as either an arbor press or a drill press, the device being particularly suitable for handling elongated Workpieces.

Another object is to provide in a press as characterized,

' upper, lowerl yand intermediate work supports, With the intermediate work-support vertically adjustable, and also mounted -to be swung laterally out of the way when not in use; the intermediate work-support being further adapted to combine with thel top work support to provide a work-snpporting table. v

A further object `of the invention is to provide `a multiple position indexing and supporting means for the 'l aforementioned vertically adjustable work-supporting member, and which indexing means is removable so as to be out of the way when said adjustable work-supporting member is not in use.

Further, the invention contemplates a press wherein an upper work-support provides a mount for a drill head adapter when the device is usedas a drill press; and which mount is adapted to carry a bracket on which a ram-operating head adapter is adjustably supported when the unit is to function as an arbor press.

An additional aim of the invention, in its arbor phase, is to furnish a novel work head adapter and supporting `bracket assembly, whereby the work head adapter will be conveniently mounted for ready vertical adjustment in respect to the bracket and xedly retained in different adjusted positions.

It is also an object of the invention to provide in a drill tor arbor press, a novel vertically shiftabfle and outwardly swingable Work-supporting table element, and novel means for supporting same in operative posit-ion with respect to a drill or Work head carried nam and to retain it against outward swinging.

Invention also resides in certain detailed features of construction, combination and arrangement of the various parts, and in modes of operation of same, as will be readily understood and appreciated by those versed in the art upon reference to the accompanying drawings in connection -with the detailed description thereof to follow.

In` conformity with statutory requirements, I have illustrated herein a now preferred example of the in vention. However, it is to be understood that what is shown in the drawings is to be taken as merely illustrative rather than limitative, since it will be obvious that my inventive concept is susceptible of other mechanical expressions within the spirit and scope of the subject matter claimed hereinafter.

In the drawings, wherein the same reference characters have been used to designate the same parts Wherever they appear in the several views- FIG. 1 is a perspective View of my universal press, converted for arbor press use with the vertically adjustable work head adapter `and its supporting bracket in 3,100,438 Patented Aug. 13, 1963 "ice Merkel, 97s Aenans neas, Lafayette, naar.

latter a ventioally shiftable work support member cooperates, as indicated in dotted lines, to provide an upper work-supporting table; i fi FIG'.` 2 is a detail view of the detachable supporting lug for the slidable Work-supporting member, the View being taken on :the line vZ--Z of l andwith centain bearing portions forthe clamp lug-Securing pins,-broken away and shown .in section; i f

FIG. 3 is anotherdetailview taken on the line 3-3 v FIG. 4 is la perspective view of one of `the lars shown in FIGS; 1 and 3; i i

FIG. 5 is a toplplanview partly broken. and partly in section, and showing the upper work-supporting member of FIG. l removed from its supporting posts and showing the adjustable and separable connection'of the work head adapter withits supporting bracket; FIG. 6is` a top plan view illustrating a drill head adapter mounted on the upper work support, in lieu' of the work head adapter of- FIGS. 1 and 5;

FIG. 7 is a front elevational view of thel drill head `adapter shown in FIG. 6;

FIG. 8 is an elevational detail view, partly in section illustrating the use of the indexing plate and posts of FIG. 1; and

FIG. 9 is a fragmentary side elevational view of the work head adapter and its supporting bracket.

Referring to the drawings by reference characters, and turning to FIG. l, it will be seen that the pedestal type press shown provides the work holding base 1G which has the transverse bolt receiving holes 9, 9a so that it can be bolted lto a floor or other supporting surface. A baseprovided work-locating hole 10b, and the usual T-slots` 10c for work-holding means are also shown.

lRising from seats 10a in the base 10 are the posts 11, 12, y13 which support an upper Work-holding table element 14 whose forward end is U-form to provide the frontally opening recess 14a. Table element 14 has the T-grooves 14e for Work-holding elements. The upper ends of posts `11, 12 and 13 seat in holes 15 in the under surface of member 14, as shown. l

Also .shown in FIG. l is la removable and rotatably adjusted disk form indexing plate 10x. This indexing plate 10x `has posts which cooperate in the support of a superjacent table element member 19, las will be explained hereinafter.

The rear portion of table element 14 provides the lmounting p-ad 14h (FIG. 6) which, when the unit is in use as an sarbor press as in FIG. 1, detachably carries the base 16a of a bracket 16 which latter mounts, for vertical adjustment, a work head adapter 17. Machine screws :1Gb or the like secure base 16a to pad 14h, best shown in FIG. 5.

It should be stated here, however, that when the unit is used as a drill press, as in FIG. 6, the mounting pad 14h of member 14 supports the base 18a of a drill head adapter 18.

Also incorporated in the invention is an intermediate Work-holding table element 19 to which incidental reference has been made earlier herein. This intermediate table element 19 is slidably carried by the forward posts l11, 12 for movement between base 1l)` and the upper table element 14. As shown, table element 19 has dethrust colpending sides"1r9a, front Wall portions 19C, a forwardly opening Work-receivingopening19b, andforwardly opening T-grooves 19x for conventional Work securing means. In the use of the device, particularly as an arbor press, as shown in FIG. 1, the intermediate Work-holding' member :19 may cooperate with one of fthe other or both of the base and upper table element 14 in supporting a work piece. Also, as suggested in dotted lines in FIG. 1, `the intermediate table element 19 is movable into the recess 14a of the upper table element 14 tto complete a table form work support. v

j Still referring vto the lintermediate,work-holding rtable .unit-providingmember 19, it is to be noted, as indicated -in dotted Llines'in FIG. 1, that `it can, `aswill be presently explained, be disconnected from the frontal post 11, and swungbodily out of the lway'a'bout the companion frontal post 1,22, aspri axis.y j j j v Y Comingrnow to the means for slidably mounting `the ,intermediate work-,holding mem'ber 19 and providing for the above mentioned outward swinging of-same as shown in Adotted, linesy in Fi-IG; '1l-ity vrillrbeY noted rthat': the sides 19a"V ofmember 1,9 have connected thereto4 the combined .spl-itftype.clamp-and guide 'lugs 20 and 21 through which the respective posts 11 and 12 extend. Clamp screws- 22-working1through opposed and separated pontions of -the respectivelugs 20,A 213,(see FIG. 2) ,and cooperating ,'Wiihnnts'Z, enable member 19 to be secured in selected positions.

sidewall 19a of member V19, one side of lug 20 is shown in FIG. 2 as having a transverse bore 24a into which is threaded Vthe set screw 24 whose innerend slidably fengages in thelongit-udinal groove 2S of the post 11. The yreason for this lug and groove arrangement 24, 25 is t-o maintain :the wall surface 26 of lug 2()l Vsubstantially in `plane with the outer `surface of the side wall 19a of member 1.9 so ,that the latenally spaced pairs of trans- `verse fbores 27a, 28a of l-ug 20' and the side :19C of mem- ;ber 1 9, respectively, can be readily aligned to receive coupling pins v2,9. Y

2 also shows that Ibores 27a, 28a are `provide by the respective bearing portions 427 and 28 of the lug V20 and -:the side YWall 19a of member 19, an'd that the rear ends fofpsaid'pins 29, inwardly of wall 19a are .connected by an operating handle 30. Pins 29 also have vClosed Vlongitudinally extending transverse -slots 32 rthrough which extend keeper pins 31 carried by the :table element (19) vprovided bearings 28. This is so as to maintain lasse-mbly `of .the pins 4v1 with the table `element tf1-9.

In the Iuse ofthe device,` panticulanly as an arbor press for different work pieces, the sliding work-supporting 'table element 19 will `frequently be required to be set at different predetermined elevations with respect to base 10. -For this reason iand .also to provideforquick shifts of'mernber 19 from ione position'to another, it is desinable lto provide jmeans `for supporting said table :element 19 :in a selected ,position independently .of the frictional clamping action of lugs 20, 211 on posts 11, 12. In carrying' out this phase of -the invention, l provide the posts4 11, 12 with sectional Athrust collars 34 for the support of table element .19 sustaining lugs 20, 21. These thrust collars 34 may be employed in conjunction with or Aindependently of .thei-'earl'ier mentioned inde-x plate 10x and .upstanding indexing posts. v

As shown 'in FIGS. 3 and 4, the Ithnust coll-ars 34 comprise duplicate ring halves 34a which yhave the' inwardly extending load-sustaining ilanges 35 for selec- 4tive engagement in the annular longitudinally spaced transverse grooves 36 of posts 11, 12. The halves 34a lof each :thrust collar 34 are maintained in operative post engaging position by a coil spring 37 seated in the exterior collarJprovided groove 318. As shown, the thrust `collar sections 34 provide the outwardly extending iinger grip-providing portions 39. By use of finger grip portions 39, relatedl sections 34a can Ibe readily pulled outwardly in opposite directions against the `action of -the associated spring 37 when it is desired to shift the collar 34 from one groove (36) setting to another.

Referring to FIGS. 'l and V5,l and tothe bracket 16 for supporting the work head adapter 117, said Vbnacket 1.6provides, in addi-tion to base 16a, the upstan'ding base-carried frontal --wall 40 which is sustained in upright position bythe two rear-wardly extending and laterallyV spaced base-carried braces 41. 4

As indicated in FIGS. lV and 5, upstanding frontal `Wall 40 of bracket 16 provides in Ithe forwardly facing guideway 4Gb intermediate its ,thickened longitudinally :coextensive sideV portions 40a, the closed longitudinally .extending slot 42. Extending -throughthis slot 42 is ythe securing bolt 43 which projects `outwardly from the midpart 'of the rectangular boss-like portion 44a of the base 44 o f the work, head adapter 17 and'receives lnut 43a.

FIGS. l and 5 also show that eac-h side margin-adjacent rear surface of the base 44 ,of the work head adapter 17 upon bolt 43, but also make the bolt 43v substantially vload Y free in service. g

The work head adapter 17 providesthe ram assemblycarrier portion 46 extending forwardly from its ibase40,

-said portion 46 providing the guide bearing 47 for the, Y

ram element 48. Ram element 43 has the lrack -teeth 48a `which are engaged by the actuating pinion 49which is controlled by the hand operated shaft 49a. As will be understood, the Work engaging ram assembly,V per se, forms no part of the presentinvention.

Referring to lthe Vpreviously mentioned drill head adapter 18 of FIGS. 6 and 7, -it has the split clamp collar 51 controlled by `a screw 51a for a drill head (not shown). The base 18a of drill head adapter 18A has closed side margin-.adjacent slots 52 for machine screws 53 which adjustably secure it to the mounting pad 14h `ofthe upper table element '14. j

Referring to `the earlier mentioned position indexing disk 10x for the vertically shifltable :table element 19, `said disk is shown as having three margin-adjacent and lupstand-ing indexing `bars 6i), 61 and 62 ofdiflerent-lengths which are circumferentially Ispaced from one another equal distances. -Commencing at their upper ends 6%, -l-b, 62h, the respective indexing bars are reduced -to approximately one half (1/2) thickness'lto provide lflatfaces 60e, 61e, 62e, respectively, of equal length `land which terminate in the respective shoulders 60a, 6111,62@

Each of the above mentioned indexing bars 160, 61, 62 has its lower end rotatably journalled in abear'ing hole 63 .in disk lx as shown yin FIG. 8. FIG. V8 also lshows the Yindexing disk 10x as having a concentric `pilot ibearing '65 .projecting from its lower face and 4rotatably received in the 'bearing hole 64'in the top of base member 10, This disk 19x lis lremovably and rotatably mounted on base .1-0.

FIG. 1 'alsodisclosesthe rear rend of the vertically shift- 4able table element 19 as having a xedly depending and .centrally located vbar -66. As shown in FIG. :8, lthe table element carried bar 66 is reduced to about one half .thickness commencing at its lower end to provide a flint face 66e which terminates in a shoulder 66a. Face 66C corresponds in length with the lengths of the ilat faces of the `disk-provided bars.

rrG. 1 (or. as, FIG. s).

5 As will be understood from FIGS. 1 and 8, the respective disk-provided bars 6d, el, d2 are adapted to be selectively aligned with the bar 66 `of table element 19 upon partial rotation of disk 16a'. When any one of the upstanding disk-provided bars 6ft, 6i, d2 is alignedwith the table element-provided bar- 66, the other tw\o disk-provided bars will be disposed rearwardly of the plane of v the rear end of table element i9, as indicated in FIG. l. Thus, the table element l@ can be lowered to engage its bar` 66 with the aligned disk-carried 'bar` such as .61 in A functionally integral support for the rear end of the shiftable table element i9' is thus provided whether the aligned bar ends 66a, dit!) are engaged (FIG. 8) `or whether there yis a shoulder and end joint-providing engagement 69a, 66]?, 66a as in FIG. 1.

From the foregoing description, read in connection with the accompanying drawings, it is believed that the construction, operation and advantages of my novel press will be readily understood and appreciated.

When the device is used as an arbor press as in FIG. 1,` elongated work pieces lmay be secured by conventional means to the base liti, intermediate and upper work holders i9, id, respectively. Also the intermediate work holder 19 can be adjustedto cooperatewith either the base `lit or upper work holder 14 to support a piece off work; yor it can be swimg out of the Way, as suggested in dotted lines in FIG. 1, when'not needed.

Likewise, when the intermediate work support is not in use, the indexing plate ltix is simply removed. Use of indexing plate 19x is, of course, optional. However, it dees cooperate with the collar 34 and post grooves 36 to deiine six positions of adjustment of work holder 19, and

it also supports -the rear end yof work support 19.

lt is a simple' matter to free the work support 19 for outward swinging about post l2, by simply pulling the l pin coupling Si) to the right as seen in FIG. 2.

When the intermediate work support 19 is not located in .a position defined by post grooves 36, the guide lugs Zt) and 2i will be fully tightened on posts. But otherwise use of thrust -collars 34 makes such tightening unnecessary 'beyond what is required for a snug sliding tit on the respective posts il, 12.

Having thus described my invention, what I claim is:

1. In a drill or arbor press for machine shops, the combination of a base member and a top member, a base member-provided supporting means spacing the top member above said base member, an intermediate vertically slidable work-supporting member between said base and top members and carried by said top member-supporting means, adjustable means supporting said intermediate ember in predetermined positions between said base and top members, said top and intermediate members having aligned openings therein, a carrier for a work engaging element supported by said top member and providing a bearing for a ventically shittable work-engaging member, said 'bearing being alignable with said top and intermediate member-provided openings, and said intermediate member being movable into said top member opening to cooperate with the top member in the provision :of a work table.

2. The structure of claim 1, and said ibase member having retaining means lfor work-securing elements, whereby the base member can function as a work support.

3. The structure of claim l, and said carrier-provided Abearing disposed above the plane of the upper surface of said top member, and the latter having retaining means for work-securing elements, whereby the top member itself can function las a work support.

4. The structure lof claim l, and said base member having retaining means for work-securing elements, whereby the base member can function as a work support, said cop member-supporting means including upstanding posts adjacent opposite sides of said base member and the ,adjustable intermediate member supporting means comprising collars slidable on said posts, means detachably 'connecting one of said collars to [one side of the intermediate member, the other coll-ar xedly secured to the opposite side tot said intermediate member and being rotatable on its post, whereby when the first-mentioned eoliar is disconnected from .the intermediate member the latter can be bodily swung outwardly clear of work that may be supported ion the base member.

5p. The structure of claiml l, )and said top member supporting means including an index plate rotatably and removablysupported by said base 'adjacent the plane yotl one `edge of said intermediate mem-ber, a plurality of upstanding and substantially circumferentially spaced indexing bars ot differentlengths rising from said index plate `for selective supporting engagement with an under portion yof said intermediate member while the other indexp ing bars are disposed outwardly ot the plane of said edge of the intermediate member. Y

6. The structure of claim l, and said top member supporting means including an index plate rotatably and removably supported by said 'base adjacent the plane iof one edge of said intermediate member, a plurality of upstanding and substantially cincumferentially spaced indexing bars tot different lengths rising from said index plate, a depending fixed bar carried by said intermediate member adjacent its aforementioned edge and with which depending bar said opstanding indexing bars are selectively engageasble end to end to support the intermediate member while positioning the other indexing bars outwardly of the plane of said edge, said depending bar and each of the indexing bars being reduced in thickness to provide` matching longitudinal bearing faces extending inwardly equal distances from their free ends and terminating in transversely extending bearing shoulders, and each of said npstanding indexing bars being notatably carried by .said index plate whereby the bearing shoulders of the respective indexing bars can be selectively brought into supporting engagement with the shoulder of said depending bar, so that each indexing bar is adapted to define two positions of elevation of said intermediate member above said base member.

In a drill or arbor press for machine shops, the combination of a base member and a U-shaped top member providing a lbight portion of substantial depth, a baise member-provided supporting means spacing the top membe-r above said base member, an intermediate vertically slidable work-supporting member between said base and top members and carried by said top member-supporting means, adjustable means supporting said intermediate member in `predetermined positions between said base and top members, said top and intermediate members having aligned openings therein, a mounting pad formed 'on the top surface of the -bight portion olf said top mem.- ber adjacent the latters opening, and a carrier for a work engaging element removably and adjustably supported on the mounting pad fof said top member, means securing the carrier in adjusted positions on said mounting pad, said carrier providing a bearing for a vertically sbittable work-engaging member, whereby said bearing is alignable with different areas of said top and intermediate member-provided openings.

8. In a drill or arbor Ipress for machine shops, the combination of a base member and a top member, a base member-provided supporting means spacing the top member labove said base member, an intermediate vertically slidable work-supporting member between said base and top members and carried -by said top member-supporting means, adjustable means supporting said intermediate member in predetermined positions between said base yand top members, said top and intermediate members having ialigned openings therein, a carrier for a workengaging element supported by :said top member and providing a bearing for a vertically shiftable work-engaging member, said bearing being alignabile with said top and intermediate member-provided openings, said base member having retaining means for work-securing elements, whereby the base member can function as a work sup- Y 7 port, Vsaid .top vmember supporting means including upstanding posts adjacent opposite sides of said base mem- -upper surface of said top member and extending rear- Y wardly from adjacent said opening, a bracket member 'berand the adjustable intermediate member supporting 1 Ameans Icomprising `collars islida-ble -on said posts, means detachably-connecting one ot said collars to one side of the intermediate member, the lother of said collars xedly securedto 'the-,opposite side of said intermediate member Iand being rotatable on its pest, whereby when the irst collar is disconnected from the intermediate member the llattericanV be bodily swung outwardly-clear of Work that may be supported on the base member.

9L -ln a drill or arbor press for machine shops, the

' V combination of a base member and a top member, a base jmember-provided lsupporting means Spacing the top member above said base member, an intermediate vertically slidable Vwork-supjiaorting member between said base and top members Aand .carried by said top member-supporting means, adjustable means supporting said inter- -mediate member in predetermined positions between said 'base Vand top members, said top and intermediate memtbers having aligned 'openings therein, a carrier for a work- :engaging element supported by said top member and providing aptbearing for a vertically shiftable work-engagingmem-ben-said bearing being alignable with said -ltop and intermediate member-provided openings, said top member supportingmeaus including an vindex plate rotatably `and removably supported by said base adjacent Y of said edge yoff the intermediate member.

10. In a drill or arbor press for machine shops, the combination of a base member and a top member, a base member-provided supporting means spacing the top member above said base member, an intermediate vertically slidable work-supporting member between said base and top members and carried by said top member-supporting means, adjustable means supporting said intermediate member in predetermined positions between said base and top members, said top and intermediate members having aligned openings therein, a carrier for a workengaging element supported by said top member and providing a bearing fora vertically shifta-ble work-engaging member, said bearing being alignable with said top and intermediate member-provided openings, and said top member supporting means including an index plate rotatably and removably supported by said base adjacent the plane of one edge of said intermediate member, a plurality `of upstanding and substantially circumferentially spaced `indexing bars of different lengths rising from said index plate, a depending xed bar `carried by said intermediate member adjacent its aforementioned edge and with lwhich depending bar said upstanding indexing bars yare selectively engageable end to end to support the intermediate member while positioning the other indexing .bars outwardly of ,the plane of said edge, said depending bar andieac'h of the indexing bars being reduced in thickness to provide matching longitudinal bearing faces extending inwardly equal distances from their free ends and terminating in transversely extending bearing shoulders, and each of said upstanding indexing bars being rotatably carriedby said index plate whereby the bearing shoulders of the respective indexing bars can be selectively lbrought into supporting 'engagement with the shoulder of said depending bar, so that each indexing bar is adapted to dene two positionsv of elevation of said intermediate member above said base member.

11. In, a drill or arbor press for machine shops, the combination of a base member and a top member, a base member-provided supporting means spacing the top member above said base member, said top member having an opening extending therethrough, a mounting pad on the having a ,base adjustabl; secured to said mounting pad in dier'ent positions with respect to said top member opening, said bracket memberlproviding an upstanding wailV portion, a work-engaging element carrier providing .a bearing for a vertically adjustable work-engaging element, Vand means in'part provided by said carrier and in part by said upstanding bracket wall portion for securing the carrier in vertically adjusted positions on the wall portion with the .carrier bearing aligned with said opening. v

12. The structure of claim 1-1, and the carrier securing means which is provided by said bracket wall portion and .carrier comprising vertically spaced interengageable transverse cleat and groove means for locating the carrier in predetermined adjusted positions in respect to said wall portion and for 'absorbing vertical stresses from a workengaging member in said carrier bearing.

' 13. lnja drill 'orarbor press. providing a base Vand a superjacent support for the carrier of a work-engaging frnember, a work support, laterally spaced guide posts rising from said base, bearings `carried by said work supportV and through which said posts extend whereby to slidably mount the work support, each of said posts havingpvertically'and correspondingly spaced transversely extending surface recesses, and a separable section work support-sustaining member carried by and slidable on each of said posts independently of said work support, and each of said -Work support-sustaining members having inwardly extending lug means selectively engageable in said post recesses, whereby to support said work support in predetermined horizontal positions. i Y 14. The structure `of claim 13, .and the upstandin bracket wall portion providing a vertically extending guideway in its face which is adjacent said top member opening, said guideway `having a closed vertical slot ex- Y tending therethrough, the rear face of said carrier` having a Hat-sided boss working in said guideway and engaging sides of the latter, `and a bolt xedly projecting from said boss `and extending through said guideway'to receive a clamp nut whereby to adjustably'secure the carrier toV rsaid bracket wall portion.

i support-carried guide being rotatable about its post `as an axis whereby when the other guide is disconnected from the work support whereby the latter can be swung outwardly of the plane of said base, and cooperating means provided by the detachable work support-carried bearingproviding guide and its post for preventing relative rotation of same.

16. The structure of claim 1S, and said detachable guide bearing and the adjacent portion of said work support having two alignable bearings, coupling pins working in said bearings and movable into the work supportprovided bearings to release the detachable guide, Aand a nger piece providing operating connection between the inner ends of said coupling pins.

117. In a drill or arbor press providing a base and a superjacent support for the carrier of a work-engaging member, a work support, laterally spaced `guide posts rising from said base, bearings carried fby said work support and through which said posts extend .whereby to slidably mount the work support, each of said posts having vertically and correspondingly spaced annular surface grooves, a work-support-sustaining collar slidable on each of said posts, each of said collars being vtransversely split to provide t-Wo sections and each collar section hav- 10 ing an inwardly extending post groove-engaging lng 11,418,435 Gardiner June 6, 1922 means; and inwardly acting collar-carried and exteriorly 1,977,423 Blazek et al. Oct. 16, 1934 positioned spring-like means tending to draw said collar 2,092,430 Stratton Sept. 7, 1937 sections together. 2,360,921 Wiken Oct. 24, 1944 v 5 2,742,853 Knelson Apr. 24, 1956 References Cited inthe file of this patenty 209601263 j Goddard NOV' 15 1960 UNITED STATES PATENTS FOREIGN PATENTS 844,754 Sardou et a1. Feb; `19, 1907 164,689 Austria Dec. 10, 1949 1,201,162 Eames Oct. 10, 1916 10 2,693 Great Britain 1882 1,397,910 Taylor Nov. 22, 1921 408,593 Italy Jan. 4, 1945 

1. IN A DRILL OR ARBOR PRESS FOR MACHINE SHOPS, THE COMBINATION OF A BASE MEMBER AND A TOP MEMBER, A BASE MEMBER-PROVIDED SUPPORTING MEANS SPACING THE TOP MEMBER ABOVE SAID BASE MEMBER, AN INTERMEDIATE VERTICALLY SLIDABLE WORK-SUPPORTING MEMBER BETWEEN SAID BASE AND TOP MEMBERS AND CARRIED BY SAID TOP MEMBER-SUPPORTING MEANS, ADJUSTABLE MEANS SUPPORTING SAID INTERMEDIATE MEMBER IN PREDETERMINED POSITIONS BETWEEN SAID BASE AND TOP MEMBERS, SAID TOP AND INTERMEDIATE MEMBERS HAVING ALIGNED OPENINGS THEREIN, A CARRIER FOR A WORK ENGAGING ELEMENT SUPPORTED BY SAID TOP MEMBER AND PROVIDING A BEARING FOR A VERTICALLY SHIFTABLE WORK-ENGAGING MEMBER, SAID BEARING BEING ALIGNABLE WITH SAID TOP AND INTERMEDIATE MEMBER-PROVIDED OPENINGS, AND SAID INTERMEDIATE MEMBER BEING MOVABLE INTO SAID TOP MEMBER OPENING TO COOPERATE WITH THE TOP MEMBER IN THE PROVISION OF A WORK TABLE. 